OAKLAND — The Chauncey Bailey murder trial has been delayed until next week after an alternate juror called in sick Tuesday.

Judge Thomas Reardon said he had received documentation from the juror’s doctor confirming an illness. Reardon delayed proceedings in the case to Monday, because court is closed Thursday for Cesar Chavez Day and the trial is not conducted on Fridays.

Reardon said he preferred to delay the proceedings rather than dismiss the juror because the prognosis for a quick recovery is strong. The trial is expected to take three months or more, and five alternates were seated.